Gumby Framework is described as 'Create rapid and logical page layout and app prototypes with Gumby Framework, a flexible, responsive CSS framework, powered by Sass' and is an website in the Development category. There are more than 25 alternatives to Gumby Framework, not only websites but also apps for a variety of platforms, including Self-Hosted solutions, Mac, Windows and Linux. The best alternative is Bootstrap, which is both free and Open Source. Other great sites and apps similar to Gumby Framework are React (Free, Open Source), Materialize (Free, Open Source), UIkit (Free, Open Source) and Semantic UI (Free, Open Source).
Riot lets you build user interfaces with custom tags using simple and enjoyable syntax. It uses a virtual DOM similar to React but faster. Riot is very tiny compared to industry standards. We think there is a clear need for another UI library.